Valve-operating mechanism



E. STUKE.

VALVI` OPERATING MECHANISM.

Patented Nov. 2, 1920.

APPLICATION FILED MAY I2. I9I9.

www

UNITED STATES' PATENToFFicE.

ERNEST STUKE, 0F MERIDIAN, MKISSISSIPPI.

VALVE-OPERATING MECHANISM.

Specification of Letters Patent. i

PatentedNov. 2, 1920.

Application filed May 12, 1919. Serial No. 296,669.

`vide a valve structure wherein a single valve is employed for controlling the passage of thc fuel into the engine cylinder, and controlling the exhaust from the same.

A second important object of the invention is to provide a valve mechanism and operating means therefor, which is of the reciprocatory type, a single valve being employed for controlling the inlet of fuel into the engine cylinder and the outlet of the exhaust gases therefrom, in conjunction with the usual reciprocatory'valve in the `head of the cylinder which is closed during the explosive operation therein and which is opened after the explosive operation, both valves being operated by a common' operat-A ing mechanism.

Another object of the present inventionis te provide a Yvalve operating mechanism whichneccssit'atcs only one timer lrod and a single cam for operating the same to operate a valve in the cylinder head and a second 'valve which controlsboth the intake and the outlet ports the cylinder.

An additional obj ect is to provide a valve construction' of the above character which is simple in construction, which consists of few parts, and whiclrmay be manufactured and placed on the market ata minimum cost.

Nith the above and other general objects and advantages in mind, the invention consistsof combinations of elements, arrangements of parts, constructions and operations, and general assemblage all of which will be hereinafter fully enlargedupon and illustrated in the accompanying "drawings, wherein the preferred types of the invention are shown, the novel features of the invention being defined in the subjoined claims.

On the drawings .Figure 1 is a fragmentary vertical sectional view of an internal combustion engine including the spring-actuated reciprocatory valve, and operating mechanism therefor as constructed in accordance with my invention; and

Fig. 2 is a like view showing a moiilfied valve operating mechanism.

Referring to the drawings in detail `and vparticnlarly to Fig. 2 which shows the preferred embodiment of the invention, the cngine cylinder is indicated at 5 having a com mon inlet and outlet port 6 and further provided with a valve chamber 7 provided with Vaninlet port4 8 and an eXhaust port 9 both of which communicate cylinder l A reciprocatory valve 10 is mounted in the cylinder and reciprocates threugh the stuffing box 11 in the cylinder 5. A second reciprocatory valve 12 is mounted in the valve chamber 7. v T he washer 13 is secured to the valve stem of the valve 12, while a with the port 6 in the fixed collar 1&1, secured `to the casting is er gaged upon the valve stem and above the washer 13, an expansible coil spring 15 being positioned on the valve stem and interposed between these two washers. The col lar 16 is slidably mounted upon the upper end of the valve stem and sits against' the fined collar or brace 14k. .This collar 16 normally urged into engagement with the An eccentric 19 is carried by the camshaft Y of the engine (notsho'wn) 'which operates an eccentricV arrangement 2O carried'by a timer or yoperating rod 21 which is pivotally connected with one end of a valve oil'ierating .rod 22 "as indicated at 23, the forward end of `this valve operating rod being pivotally connectedwith theV collar 16.

A sleeve 24e is positioned ony the. bushing 11 and receives the valve rod of the valve 10'. Encircling this sleeve 24 isran expansible spring 25 which bears against the bushing 11. A head 26l is formed upon the upper end: ofthe threaded sleeve 241 in which the. valve stem 10 is engaged and' is 'provided with a seat 10', the coil spring 25 bearing against this head and urging the valve rod 22 upwardly and seating the valve 102. A fulcrum 22 is formed -in the rod 22 adjacent its forward end and seats in the seat 10 in the head.

The operation of the embodiment of the invention above set forth is as follows: The valve l()2 being closed, the cam 19, through the medium of the rod 21, moves the rod V22 downwardly and runseats, the valve 102.

fulcruin point slides the collar 16V on they valve stem of the valve 12 to rise upwardly` to Vopen the intake 8 and close the exhaust 9 and allow a charge to enter the engine cylinder. At this time the cam 19 becomes inoperative and allows the rods 21V and 22 to resume their initial position, at the same time closing the valve 102. The engine now hres, the valve 102 being operated as abovementioned to'allow the exhaust gases to escape.

In the construction shown in F ig. 1 the valve 28 in the engine cylinder isy raised by action of cam 33, depressing synchronouslyv coils 31 and 29.1 A collar 29" is slid ably mounted upon the stem of this valve and is normally held against the xed brace 30 by a coil lspring 3l. An operating rod 27 which connects with the slidable collar 29is operated by a reciprocable rod 32 and a cam 33. The valve 12 which controls the intake and exhaust, in this instance is operated by means of the arm 13', which has one of its ends contacting with the head 111 positioned on the upper end of the valve member 12, the coiled spring 16 being provided for! the purpose of normally closing .the valve member 12. This arm 13 is operated by any suitable cam mechanism not Shown, but whichV cam mechanism is similar to that shown for. operating the rod27 of this figure.

. This disclosure is merely illustrative and it is to be understood that the invention is susceptible to various modifications, and that the limits of such modification are governed Y by what is claimed.

What is claimed is i i 1. In a valve operating mechanism for internal combustion engines, an` engine cylinder having a common intake and exhaust port, and further provided with an intake port Vand an exhaustport which are-inV communieationV with the common port, a reciprocableV valve for controlling the intake and exhaust ports, a second reciprocable valve mounted in the engine cylinder, a coiled spring encircling the :first .mentioned valve and normally urging the same to a position tof close the intake port, an operating lever having one end slidably and pivotally con,-

nected with the upper end of the last mentioned valve, a second coiled spring operatively connected with the lever and urging theY same downward, the lever being pivotally `connected to thenpper end of the last mentioned valve, means for rocking the vvalve rods, a stop carried by the valve stem kinder to permit the exhaust gases to escape before the first mentioned valve is moved to close the exhaust port.

2. In. a valve Voperating mechanism, an engine cylinder having a common inletV and outlet port, a valve casing-mounted adja-V cent the cylinder and provided with an intake port and an exhaust port in communication with the first mentioned port, va valve reciprocable in the casing, a coiled spring encircling the valve and urging the same to a position to close the intake port, a collar slidable upon the stem of the valve, a second expansible spring encircling the stem of thek valve and bearing against the collar, a second reciprocable valve arranged in the engine cylinder the stem thereof projecting through the cylinders, a Sleeve receivingthe stem and positioned upon the cylinder a head formed upon the upper end of the valve stem a rocking operating arm having one endv pivotally connected with the collar and adapted to fulcrum onthe head adjacent-the sleeve and bearing against the head to urge the operating Varnaj upwardly to allow the 'first' mentioned valve to close the y exhaust port, cam mechanism for rocking the arm whereupon the valve in the cylinder is opened to permit a charge to enter the same, the head abutting the upper end ofV the sleeve to cause the arm to be rocked to close the intake' port.

ln testimony that l claim ythe foregoing as my own, lV have hereto affixed my'signature inthe presence of two witnesses.

. f ERNEST STUKE. .Witnesses .Y

1 E. D. GARNEY, PUTNAM VMcLEoiv. 

